... 1000 (very fine).Grain sizes arebroadly defined ascoarse (6 to 24 ), me-dium (30 to 60), fine (70 to 180), and veryfine (22 0 to 1000).Figure 16.4 shows acomparison of threedifferent grain ... 16.3b and discussed inchapter 1, section 1.5 or pressed intodiamond wheels shown in Figure 16 .7. 16 .2. 2 Types of BondsAbrasive grains are held together ina grinding wheel by a bonding mate-rial. ... is90˚ 65˚ 45˚ 181v81818TRT60˚ 60˚ 60˚ 45˚ 45˚ EDCJGR =T 2 R =T8R =T8R =3T1065˚ 65˚ 80˚ 80˚ 60˚ 23 ˚ 23 ˚ 60˚ R RRRTBTTA FRHTITSK LRFIGURE 16.10: Twelve standard...